prologuize
/proʊˈlɒɡwɪz/Definitions
1. verb
to introduce or precede something, especially a book or a piece of writing, with a prologue or introduction.
“The author prologuized her novel with a detailed backstory of the main character.”
2. verb
to talk or write in a prologue-like manner, often to set the scene or establish the context.
“The professor prologuized the lecture by explaining the historical context of the topic.”